Examples of PathableClassLoader

org.apache.commons.logging.PathableClassLoader
A ClassLoader which sees only specified classes, and which can be set to do parent-first or child-first path lookup.
Note that this classloader is not "industrial strength"; users looking for such a class may wish to look at the Tomcat sourcecode instead. In particular, this class may not be threadsafe.
Note that the ClassLoader.getResources method isn't overloaded here. It would be nice to ensure that when child-first lookup is set the resources from the child are returned earlier in the list than the resources from the parent. However overriding this method isn't possible as the java 1.4 version of ClassLoader declares this method final (though the java 1.5 version has removed the final qualifier). As the ClassLoader javadoc doesn't specify the order in which resources are returned, it's valid to return the resources in any order (just untidy) so the inherited implementation is technically ok.

Examples of org.apache.commons.logging.PathableClassLoader


    /**
     * Return the tests included in this test suite.
     */
    public static Test suite() throws Exception {
        PathableClassLoader parent = new PathableClassLoader(null);
        parent.useSystemLoader("junit.");
        // the TestHandler class must be accessable from the System classloader
        // in order for java.util.logging.LogManager.readConfiguration to
        // be able to instantiate it. And this test case must see the same
        // class in order to be able to access its data. Yes this is ugly
        // but the whole jdk14 API is a ******* mess anyway.
        parent.useSystemLoader("org.apache.commons.logging.jdk14.TestHandler");
        parent.addLogicalLib("commons-logging");


        PathableClassLoader child = new PathableClassLoader(parent);
        child.addLogicalLib("testclasses");
        
        Class testClass = child.loadClass(CustomConfigFullTestCase.class.getName());
        return new PathableTestSuite(testClass, child);
    }

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Examples of org.apache.commons.logging.PathableClassLoader

     */
    public static Test suite() throws Exception {
        Class thisClass = GeneralTestCase.class;
        ClassLoader thisClassLoader = thisClass.getClassLoader();
        
        PathableClassLoader loader = new PathableClassLoader(null);
        loader.useExplicitLoader("junit.", thisClassLoader);
        loader.addLogicalLib("testclasses");


        // reload this class via the child classloader
        Class testClass = loader.loadClass(thisClass.getName());
        
        // and return our custom TestSuite class
        return new PathableTestSuite(testClass, loader);
    }

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Examples of org.apache.commons.logging.PathableClassLoader

        Class thisClass = ChildFirstTestCase.class;
        ClassLoader thisClassLoader = thisClass.getClassLoader();
        
        // Make the parent a direct child of the bootloader to hide all
        // other classes in the system classpath
        PathableClassLoader parent = new PathableClassLoader(null);
        parent.setParentFirst(false);
        
        // Make the junit classes visible as a special case, as junit
        // won't be able to call this class at all without this. The
        // junit classes must be visible from the classloader that loaded
        // this class, so use that as the source for future access to classes
        // from the junit package.
        parent.useExplicitLoader("junit.", thisClassLoader);
        
        // Make the commons-logging.jar classes visible via the parent
        parent.addLogicalLib("commons-logging");
        
        // Create a child classloader to load the test case through
        PathableClassLoader child = new PathableClassLoader(parent);
        child.setParentFirst(false);
        
        // Obviously, the child classloader needs to have the test classes
        // in its path!
        child.addLogicalLib("testclasses");
        child.addLogicalLib("commons-logging-adapters");
        
        // Create a third classloader to be the context classloader.
        PathableClassLoader context = new PathableClassLoader(child);
        context.setParentFirst(false);


        // reload this class via the child classloader
        Class testClass = child.loadClass(thisClass.getName());
        
        // and return our custom TestSuite class

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Examples of org.apache.commons.logging.PathableClassLoader

        Class thisClass = ParentFirstTestCase.class;
        ClassLoader thisClassLoader = thisClass.getClassLoader();


        // Make the parent a direct child of the bootloader to hide all
        // other classes in the system classpath
        PathableClassLoader parent = new PathableClassLoader(null);
        
        // Make the junit classes visible as a special case, as junit
        // won't be able to call this class at all without this. The
        // junit classes must be visible from the classloader that loaded
        // this class, so use that as the source for future access to classes
        // from the junit package.
        parent.useExplicitLoader("junit.", thisClassLoader);
        
        // make the commons-logging.jar classes visible via the parent
        parent.addLogicalLib("commons-logging");
        
        // create a child classloader to load the test case through
        PathableClassLoader child = new PathableClassLoader(parent);
        
        // obviously, the child classloader needs to have the test classes
        // in its path!
        child.addLogicalLib("testclasses");
        child.addLogicalLib("commons-logging-adapters");
        
        // create a third classloader to be the context classloader.
        PathableClassLoader context = new PathableClassLoader(child);


        // reload this class via the child classloader
        Class testClass = child.loadClass(thisClass.getName());
        
        // and return our custom TestSuite class

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Examples of org.apache.commons.logging.PathableClassLoader

     * Or we could fix SimpleLog to be sane...
     */
    public static Test suite() throws Exception {
        Class thisClass = DefaultConfigTestCase.class;


        PathableClassLoader loader = new PathableClassLoader(null);
        loader.useSystemLoader("junit.");
        loader.addLogicalLib("testclasses");
        loader.addLogicalLib("commons-logging");
        
        Class testClass = loader.loadClass(thisClass.getName());
        return new PathableTestSuite(testClass, loader);
    }

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Examples of org.apache.commons.logging.PathableClassLoader

     * Or we could fix SimpleLog to be sane...
     */
    public static Test suite() throws Exception {
        Class thisClass = DateTimeCustomConfigTestCase.class;


        PathableClassLoader loader = new PathableClassLoader(null);
        loader.useSystemLoader("junit.");
        loader.addLogicalLib("testclasses");
        loader.addLogicalLib("commons-logging");
        
        Class testClass = loader.loadClass(thisClass.getName());
        return new PathableTestSuite(testClass, loader);
    }

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Examples of org.apache.commons.logging.PathableClassLoader

     * Or we could fix SimpleLog to be sane...
     */
    public static Test suite() throws Exception {
        Class thisClass = CustomConfigTestCase.class;


        PathableClassLoader loader = new PathableClassLoader(null);
        loader.useSystemLoader("junit.");
        loader.addLogicalLib("testclasses");
        loader.addLogicalLib("commons-logging");
        
        Class testClass = loader.loadClass(thisClass.getName());
        return new PathableTestSuite(testClass, loader);
    }

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Examples of org.apache.commons.logging.PathableClassLoader

 * Simulates the case when TCCL is badly set and cannot load JCL.
 */
public class BadTCCLTestCase extends TestCase {


    public static Test suite() throws Exception {
        PathableClassLoader contextClassLoader = new PathableClassLoader(null);
        contextClassLoader.useSystemLoader("junit.");
        PathableTestSuite suite = new PathableTestSuite(BadTCCLTestCase.class, contextClassLoader);
        return suite;
    }

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Examples of org.apache.commons.logging.PathableClassLoader


        // Determine the URL to this .class file, so that we can then
        // append the priority dirs to it. For tidiness, load this
        // class through a dummy loader though this is not absolutely
        // necessary...
        PathableClassLoader dummy = new PathableClassLoader(null);
        dummy.useSystemLoader("junit.");
        dummy.addLogicalLib("testclasses");
        dummy.addLogicalLib("commons-logging");
        
        String thisClassPath = thisClass.getName().replace('.', '/') + ".class";
        URL baseUrl = dummy.findResource(thisClassPath);


        // Now set up the desired classloader hierarchy. Everything goes into
        // the parent classpath, but we exclude the custom LogFactoryImpl
        // class.
        //
        // We then create a tccl classloader that can see the custom
        // LogFactory class. Therefore if that class can be found, then the
        // TCCL must have been used to load it.
        PathableClassLoader emptyLoader = new PathableClassLoader(null);
        
        PathableClassLoader parentLoader = new PathableClassLoader(null);
        parentLoader.useSystemLoader("junit.");
        parentLoader.addLogicalLib("commons-logging");
        parentLoader.addLogicalLib("testclasses");
        // hack to ensure that the testcase classloader can't see
        // the custom MyLogFactoryImpl
        parentLoader.useExplicitLoader(
            MY_LOG_FACTORY_PKG + ".", emptyLoader);
        
        URL propsEnableUrl = new URL(baseUrl, "props_disable_tccl/");
        parentLoader.addURL(propsEnableUrl);


        PathableClassLoader tcclLoader = new PathableClassLoader(parentLoader);
        tcclLoader.addLogicalLib("testclasses");


        Class testClass = parentLoader.loadClass(thisClass.getName());
        return new PathableTestSuite(testClass, tcclLoader);
    }

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Examples of org.apache.commons.logging.PathableClassLoader


        // Determine the URL to this .class file, so that we can then
        // append the priority dirs to it. For tidiness, load this
        // class through a dummy loader though this is not absolutely
        // necessary...
        PathableClassLoader dummy = new PathableClassLoader(null);
        dummy.useSystemLoader("junit.");
        dummy.addLogicalLib("testclasses");
        dummy.addLogicalLib("commons-logging");
        
        String thisClassPath = thisClass.getName().replace('.', '/') + ".class";
        URL baseUrl = dummy.findResource(thisClassPath);


        // Now set up the desired classloader hierarchy. Everything goes into
        // the parent classpath, but we exclude the custom Log class.
        //
        // We then create a tccl classloader that can see the custom
        // Log class. Therefore if that class can be found, then the
        // TCCL must have been used to load it.
        PathableClassLoader emptyLoader = new PathableClassLoader(null);
        
        PathableClassLoader parentLoader = new PathableClassLoader(null);
        parentLoader.useSystemLoader("junit.");
        parentLoader.addLogicalLib("commons-logging");
        parentLoader.addLogicalLib("testclasses");
        // hack to ensure that the testcase classloader can't see
        // the custom MyLog
        parentLoader.useExplicitLoader(MY_LOG_PKG + ".", emptyLoader);
        
        URL propsEnableUrl = new URL(baseUrl, "props_disable_tccl/");
        parentLoader.addURL(propsEnableUrl);


        PathableClassLoader tcclLoader = new PathableClassLoader(parentLoader);
        tcclLoader.addLogicalLib("testclasses");


        Class testClass = parentLoader.loadClass(thisClass.getName());
        return new PathableTestSuite(testClass, tcclLoader);
    }

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